Boyfriend help.......?

Okay so lately my boyfriend has been playing on this site called gaia, which is all fine and great except the fact that he spends more time on there then with me. Like I wait for him to call, txt ect and guess what, he's not going to 'cause he's on gaia. Like I don't know how to confront him about it. It really feels like he would rather be on there with people he barely knows then with me! And this girl keeps fricking flirting with him T.T what do I do?